Summary For auditory integration (AI) therapy, the largest body of literature relates to its use in autism. Several systematic reviews of AI therapy in the treatment of autism found limited evidence to support its use. No comparative studies were identified that evaluated the use of AI therapy for other conditions.
The actual cost to install a gas fireplace may vary depending on your location, the product selected, complexity of the installation process, additional accessories purchased, and other options. 1  Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. 2  Direct-vent gas fireplaces cost $1,000 to $3,500, plus $500 to $1,000 for installation.
1 These artificial logs can cost $50 to $200. 2  Most gas fireplaces may already come with logs, while others do not. 3  A gas professional installation of the fireplace will cost around $400 to $2,000. 4  This is going to depend on the size and complexity of the job. A direct vent fireplace that vents through a hole in a wall can cost $1,400 to $4,000 not including labor. 2  There are different styles of gas fireplaces available on the market. 3  The price varies based on the design and the energy output of the fireplace itself.